Std7 Science Test 2

Which statement describes germination?
1. The growth of a plant from a seed
2. The release of energy by a seed
3. The making of food by a plant
4. The loss of water by a plan
Use the information below to answer question 2

A student had different things and he divided them into group Q and group R as shown in the table below.

Which of the following characteristics is common to the things in group R?
1. They lay eggs.
2. They can respire.
3. They produce ﬂowers.
4. They have backbones.
A piece of land has more animals than it can cany.

Which term is used to describe this practice?
1. Deforestation
2. Ecology
3. Habitat
4. Overstocking
Which of the following is not a function of toothpaste?
1. To make teeth strong
2. To relieve tooth pain
3. To neutralise acids
4. To refresh breath
Which of the following statements is true about boiling?
1. It does not need heating.
2. It does not produce bubbles.
3. It happens at a constant temperature.
4. It happens at the surface of the liquid
Which of the following diagrams shows a change in weather from partly cloudy to rainy?
1. A
2. B
3. C
4. D
Use the information and diagram below to answer question 7

Two cups are ﬁlled with water. One cup is filled with cold water and the other is filled with hot water. An object M is placed such that it is in contact with the water in both cups as shown in the diagram below.

The temperature of the cold water increased slightly after a short period of time.

Which of the following materials could have been used to make object M?
1. Cloth
2. Metal
3. Plastic
4. Wood
The diagrams below show different places at which a weather instrument is placed.

Which diagram shows a suitable place for the weather instrument?

What is the reason for applying oil to the axle of a wheelbarrow?
1. A
2. B
3. C
4. D
The diagram below shows some parts of a human head.

To which body system does part X belong?
1. Nervous
2. Skeletal
3. Circulatory
4. Reproductive
The diagrams below show set-ups used to investigate conditions necessary for germination of bean seeds.

In which set-up will the seeds germinate?
1. A
2. B
3. C
4. D
Which of the following health problems is most likely to affect a person who is overweight?
1. Goitre
2. Anaemia
3. Heart attack
4. Night blindness
The table below shows the frequency ranges of sound that can be heard by some animals. Use the table to answer question below

Which of the animals can hear a sound of 90 000 Hz?
1. Bat
2. Cat
3. Dog
4. Human being
The diagram below shows a set-up used to separate a mixture of water and sand. Use it to answer question below

Which of the following is a reason for using the set-up to separate the mixture?
1. The cloth has more mass than water
2. The sand does not dissolve in water.
3. The cloth does not have holes
4. The sand sinks in water
A boy walks along a road at night.

Which of the following safety clothing should the boy wear?
1. Shoes with reflectors
2. Protective coat
3. Eye goggles
4. A helmet
Which of the following is a natural product?
1. Car
2. Petrol
3. Paper
4. Rubber
The diagram below shows a model of a hydro-electric power station.

At which point is Kinetic energy converted to electrical energy?
1. A
2. B
3. C
4. D
A student connected two cells, a bulb and a switch in series.

Which of the following circuit diagrams represent the connection made by the student?
1. A
2. B
3. C
4. D
Which of the following processes results in a mixture being formed?
1. Making dough using flour, sugar and yeast
2. Freezing water to form ice
3. Dissolving salt in water
4. Burning ﬁrewood
Aluminium sheets are used to make the inner walls of most cooler bags.What is the function of the aluminium sheets?
1. To allow the bag to bend easily
2. To make the bags strong
3. To conduct heat
4. To reﬂect heat
Use the information below to answer question

Thako added washing soda and washing powder to the water that he uses for washing his clothes.

What is the reason for adding washing soda to the water?
1. To make the clothes soft
2. To make the water clean
3. To remove stains from the clothes
4. To reduce the hardness of the water
Use the information and diagram below to answer question that follows

In an experiment magnet 1 is freely suspended on a stand, Magnet 2 is brought closer to magnet 1 and magnet 1 moves away as shown below.

Which law of magnetism is demonstrated by the experiment?
1. Like poles repel
2. Magnets have two poles
3. Magnets attract all metals
4. A suspended magnet rests pointing north
A student was doing some experiment and the shirt he was wearing accidentally caught fire.

Which of the steps below should the student follow to put out the ﬁre?
1. A
2. B
3. C
4. D
Which of the following properties of matter applies to gases only?
1. They flow.
2. They have a deﬁnite shape.
3. They have a deﬁnite volume.
4. They ﬁll the available space.
Use the information below to answer question

A man had a bicycle which had pedals made of thin metal rods. The man replaced the thin pedals with pedals that had a rough metal frame.

Which statement explains why the man replaced the thin metal pedals with pedals that had a rough metal frame?
1. To increase the speed at the bicycle
2. To prevent damage to the bicycle pedals
3. To increase friction between the pedals and the shoes
4. To reduce the weight applied by the man on the bicycle
Which of the following changes can slow down the reaction between hydrochloric acid and marble chips?
1. Heating the mixture
2. Adding water to hydrochloric acid
3. Adding a catalyst to the reactants
4. Using marble chips with smaller particles
Which colour is used to identify the earth wire in an electric cable?
1. Black
2. Blue
3. Green
4. Red
The diagram below shows an electric circuit.

At which point can a switch be placed to turn on all the bulbs at the same time?
1. A
2. B
3. C
4. D
The diagram below shows a ray of light in the direction of a plane mirror.Use it to answer question that follows

Which diagram shows the direction of the ray of light as it is reflected off the mirror?
1. A
2. B
3. C
4. D
In which of the following set-ups will a chemical reaction take place?
1. A
2. B
3. C
4. D
Use the information below to answer question that follows

Lesego poured water into a cup and added a small amount of mealie meal powder. She stirred the contents and left them for some hours. The mealie meal powder settled at the bottom of the Cup.

Which term describes the mealie meal powder and water in the cup during stirring?
1. Solute
2. Solution
3. Solvent
4. Suspension
Use the information and diagram below to answer question that follows

An experiment was set-up to investigate the effect of temperature on matter. A ﬂask was ﬁlled with warm air and placed upside down over a bowl of water as shown in diagram 1. When cold water was poured on the flask. the level of water moved to point X as shown in diagram 2.

Which conclusion can be made from this observation?
1. Air particles moved closer to each other
2. Water particles moved further apart
3. Water particles increased in size
4. Air particles decreased in size
Puberty is a period in a person’s life when they
1. become capable of reproduction.
2. start to have sexual partners.
3. are in their teens.
4. grow taller.
Use the information and the diagram below to answer question that follows

Part of a green leaf of a potted plant was covered with black plastic to investigate a condition necessary for photosynthesis. The covered part of the leaf was labelled Q. The plant was left for 1 day and photosynthesis did not take place at Q.

What was missing at Q for photosynthesis to take place?
1. Carbon dioxide
2. Chlorophyll
3. Light
4. Water
The set-up below was used to demonstrate a chemical reaction between marble chips and vinegar. A glass tube was used to pass carbon dioxide to limewater. Use it to answer question that follows.

Which of the following substances is a product of the reaction?
1. Vinegar
2. Limewater
3. Marble chips
4. Carbon dioxide
The diagram below shows a pair of scissors. Use it to answer question that follows

During the time when the scissors is in use, what does X represent?
1. Axle
2. Effort
3. Fulcrum
4. Load
The diagram below shows a wheelbarrow loaded with grass.

During the time when the wheelbarrow is moving which part acts as the pivot?
1. A
2. B
3. C
4. D
Which of the following health risks is mostly related to teenage pregnancy?
1. Delivering by operation
2. Lowered blood pressure
3. Giving birth to an overweight baby
4. Contracting sexually transmitted infections
The diagram below shows the size of a balloon containing air before it was heated and its size after it was heated.

Which property of air did not change during the heating process?
1. The space between the air particles
2. The speed of air particles
3. The temperature of air
4. The mass of air
Use the information below to answer question that follows

A student placed a blue litmus paper and a red litmus paper in household chemicals Y and Z to determine whether they were acidic, alkaline or neutral. The colours of the litmus papers when placed in each of the chemical are shown in the table below.

How can substances Y and 2 be classiﬁed?
1. A
2. B
3. C
4. D
Use the information below to answer questions 40 and 41

The table below shows he number of students with diseases W, X, Y and Z in a hostel of school Q over the four seasons of the year.

Which of the diseases has its maximum number of infections in winter?
1. W
2. X
3. Y
4. Z
Use the information below to answer question

The table below shows he number of students with diseases W, X, Y and Z in a hostel of school Q over the four seasons of the year.

A student with disease X went to attend some celebrations in school P.

Which of the following is the most possible number of students in school P who could be infected by the disease?
1. 0
2. 4
3. 5
4. 16
Which elements are present in the compound NaOH?
1. Nitrogen, oxygen and hydrogen
2. Sodium, oxygen and hydrogen
3. Nitrogen, oxygen and helium
4. Sodium, oxygen and helium
The diagram below shows some parts of a human digestive system.Use it to answer question that follows.

Which of the following conditions could result if part X is not functioning properly>
1. Less fats will be digested
2. Less water will be absorbed
3. Less insulin will be produced
4. Less food will pass to the intestines
The diagram below shows a sketch map drawn by a student to study patterns of seed dispersal. Use the diagram to answer question that follows

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Young plants which were of the same type as the old plant were noticed to be growing from position X. What is the most likely mode of dispersal of the seeds?
1. Wind
2. Water
3. Self
4. Animals
The table below shows the number of people who abuse alcohol and the number of people who abuse alcohol and have sexually transmitted infections. Use it to answer question below

What is the conclusion that can be made from the information?
1. The number of people with STl‘s increases as more people abuse alcohol.
2. The number of people who abuse alcohol increases with age.
3. All those who abuse alcohol are infected with STl's.
4. Alcohol abuse is highest at age group 20-24.
The table below shows part of the immunisation schedule for children under 5 years. Use it to answer below questions 46 and 47

Which of the following vaccines is given once in the ﬁrst 9 months?
1. OPV
2. DPT
3. HBV
4. BCG
The table below shows part of the immunisation schedule for children under 5 years. Use it to answer below question

A child was given HBV and DPT vaccines on one of the visits to the clinic.What was the age of the child?
1. 0 months
2. 2 months
3. 3 months
4. 4 months
Use the information below to answer question that follows

A student placed ice cubes in a glass container. After sometime, water droplets started to form on the outer walls of the container.

Which statement explains why the water droplets formed on the outer walls of the container?
1. Water vapour in air was condensing on the glass walls.
2. Melting ice was ﬁltering out of the glass container.
3. Water was evaporating from the glass container.
4. Glass walls contain moisture.
Use the information and diagram below to answer questions 49 and 50

The set-up below was used to demonstrate the movement of the Earth and the Moon around the Sun. The bulb represents the Sun, the large ball represents the Earth and the small ball represents the Moon.

The small ball representing the moon should
1. reﬂect light.
2. change in size.
3. be coloured white.
4. produce its own light.
Which of the following actions need to be done to demonstrate how days and nights are formed on Earth?
1. Move the bulb around the large ball
2. Rotate the large ball around the bulb
3. Rotate the large ball on its ﬁxed position
4. Move the small ball around the large ball
The diagram below shows a plank used to lift a load.Use the diagram to answer question that follows

Which body system works in a similar way as what happens in the diagram?
1. Nervous
2. Skeletal
3. Digestive
4. Circulatory
Use the information and diagram below to answer question

Botlhale performed an experiment using two pots shown below to ﬁnd out which of the two metals is a better conductor of heat. He concluded that aluminium was a better conductor of heat.

The conclusion made by Botlhale is wrong because he did not
1. cover the pots with a lid.
2. heat the iron pot strongly.
3. record the boiling point of water.
4. use the pots which have same thickness.
Use the information below to answer question that follows

A student is given two metal rods labelled P and Q. One of the metal rods is a magnet while the other rod is a magnetic matter. The student placed the rods one above the other as shown in the diagrams.

When the rods were placed as in diagram 1, there was a strong force of attraction.
When they were placed as in diagram 2, there was a weak force of attraction.

What conclusion can the student make from the observations?
1. P is a magnet
2. Q is a magnet
3. Q attracts P
4. P repels Q
The diagram below shows a catapult ready to shoot a stone.Use it to answer question that follows

Which form of energy is stored in the rubber bands of the catapult?
1. Chemical
2. Elastic
3. Gravitational
4. Kinetic
Use the information below to answer question that follow

A study was carried out over three years in involving young adults. These were three man named Dago, Gago and Mao and four women named Lao, Lee, Nee and Nua. The study was done to show sexual relationship patterns between young adults. The results are shown in the table below.

Dago had a sexually transmitted infection in 2001 which was not treated for 2 years.What is the largest number of study participants who colud get the infection?
1. 2
2. 3
3. 4
4. 5